diff options
Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index a5d2814b1d..b3f646a187 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -446,20 +446,20 @@ These functions are declared in @file{stdlib.h}. @deftypefun {long int} strtol (const char *@var{string}, char **@var{tailptr}, int @var{base}) The @code{strtol} (``string-to-long'') function converts the initial part of @var{string} to a signed integer, which is returned as a value -of type @code{long int}. +of type @code{long int}. This function attempts to decompose @var{string} as follows: @itemize @bullet -@item +@item A (possibly empty) sequence of whitespace characters. Which characters are whitespace is determined by the @code{isspace} function (@pxref{Classification of Characters}). These are discarded. -@item +@item An optional plus or minus sign (@samp{+} or @samp{-}). -@item +@item A nonempty sequence of digits in the radix specified by @var{base}. If @var{base} is zero, decimal radix is assumed unless the series of @@ -471,7 +471,7 @@ Otherwise @var{base} must have a value between @code{2} and @code{35}. If @var{base} is @code{16}, the digits may optionally be preceded by @samp{0x} or @samp{0X}. -@item +@item Any remaining characters in the string. If @var{tailptr} is not a null pointer, @code{strtol} stores a pointer to this tail in @code{*@var{tailptr}}. @@ -499,9 +499,11 @@ There is an example at the end of this section. @comment ANSI @deftypefun {unsigned long int} strtoul (const char *@var{string}, char **@var{tailptr}, int @var{base}) The @code{strtoul} (``string-to-unsigned-long'') function is like -@code{strtol} except that it returns its value with type @code{unsigned -long int}. The value returned in case of overflow is @code{ULONG_MAX} -(@pxref{Range of Type}). +@code{strtol} except it deals with unsigned numbers, and returns its +value with type @code{unsigned long int}. No @samp{+} or @samp{-} sign +may appear before the number, but the syntax is otherwise the same as +described above for @code{strtol}. The value returned in case of +overflow is @code{ULONG_MAX} (@pxref{Range of Type}). @end deftypefun @comment stdlib.h @@ -568,12 +570,12 @@ These functions are declared in @file{stdlib.h}. @deftypefun double strtod (const char *@var{string}, char **@var{tailptr}) The @code{strtod} (``string-to-double'') function converts the initial part of @var{string} to a floating-point number, which is returned as a -value of type @code{double}. +value of type @code{double}. This function attempts to decompose @var{string} as follows: @itemize @bullet -@item +@item A (possibly empty) sequence of whitespace characters. Which characters are whitespace is determined by the @code{isspace} function (@pxref{Classification of Characters}). These are discarded. |